DE60213855T2 - ABSORBENT ARTICLE AND METHOD FOR PRODUCING A VACUUMABLE ARTICLE - Google Patents

Abstract

An absorbent article having a first essentially liquid permeable surface layer (13), a backing layer (14) and, located between said liquid permeable surface layer (13) and said liquid impermeable backing layer (14), an absorbent body (15). The absorbent body has cavities (20) which are essentially cone-shaped and extend at least through part of the absorbent body (15), said cavities (20) having a tip part (21) and a base (22), the tip part (21) being located towards or in the liquid permeable surface layer (13) and the base (22) being located away from the liquid permeable surface layer (13). The inner surface of said cavities (20) is treated with at least one functional substance.

Description

technical area

The The invention relates to an absorbent article such as a diaper, a diaper, an incontinence pad, a panty liner, a microslip insert, a Sanitary napkin or similar with a first substantially liquid-permeable surface layer, a substantially liquid-impermeable cover layer and one between the liquid pervious surface layer and the liquid-impermeable cover sheet arranged absorption body from at least one location.

The The invention also relates to the production of an absorbent article with conical cavities or recesses or depressions.

State of technology

Becomes an absorbent article such as a diaper; Diaper, an incontinence pad, an incontinence product with a belt, a Panty liner, a micro-lip liner, a sanitary napkin or the like used, in all cases a section of skin covered. That means it's for the skin difficult to transpire, d. H. to breathe, which often happens leads, that it is warm and moist inside the absorbent article becomes. The problem becomes even more noticeable when the absorbent article was used, d. H. Movements, urine, menstrual fluid or the like exposed is.

apart from one for the carrier unpleasant and uncomfortable sensations are also direct hygienic To consider aspects. A warm and humid environment is a good currency for bacteria, fungi and the like.

This especially applies to absorbent objects, the movements, urine or menstrual fluid (or mixtures thereof), wherein a warm and humid environment along with bacterial diversity, those from the body excretions due to an active growth unwanted Lead microorganisms can with the consequences, such as unpleasant odors, skin irritations, rashes, Itching and the like.

Attempts to produce the breathability of absorbent articles have been achieved, inter alia, by the use of so-called breathable cover layers. The EP 1,040,800 A1 describes z. B. a cover layer of a plastic film with perforation holes. However, this document does not provide a suitable solution to the problem because only those parts of the absorbent article that are close to the topsheet benefit from the breathable topsheet and the increased airiness that it is intended to provide.

The WO 00/10500 describes an absorbent article having a so-called ventilation position. The ventilation position has big ones straight cylindrical holes on, which are meant to be breathable areas in the absorbent To create an object. That means a big part the absorption capacity lost in these parts of the nucleus. In addition, the holes are beyond often closed by other layers and therefore provide only one limited effect in the form of airiness.

It There is therefore a need not only for breathability but also in parts of the absorbent article in a sophisticated way a fully breathable absorbent To produce the object of moisture, generally speaking, the whole Absorbs absorbent object away while the leak safety is maintained.

epiphany the invention

By means of the present invention, an absorbent article of the aforementioned type has been created, which substantially eliminates the problems of such previously known articles. An article according to the invention is mainly characterized in that the absorbent article has cavities which are substantially conical or have a pyramid-like or funnel-like shape, comprising such cavities having more sides than a pyramid and extending at least through part of the absorbent body and in that the cavities have an upper part and a base, wherein the upper part has a smaller circumference than the base and towards or in the liquid-permeable surface layer 13 is arranged and the base is disposed away from the liquid-permeable surface layer.

Substantially conical cavities are described below. In this context, the term substantially conical cavity also includes various pyramid-like and funnel-like shapes. Furthermore, a substantially conical cavity also means, in addition to purely conical cavities, cavities which have more sides than a pyramid. It is emphasized that the more sides of the substantially conical hollow has room, it approaches a purely conical shape.

In the essentially cone-shaped cavities be configured by at least a part of the absorption body, an airy absorbent object is created without the Significantly worsening outflow safety. The absorption capacity in the ventilated absorbent body can be dehydrated to some extent liquid be regenerated. The prerequisite for such a regeneration the absorption capacity is that the absorbent article is very airy, d. H. breathable is because he is as fast as possible should dry out.

The Liquid, the carrier when it carries the object, is due to the capillary forces in the upper Part cavities, that of the liquid-permeable surface layer do not flow down into the substantially conical cavities. There the cavities essentially conical are, the liquid becomes initially tend to remain in the upper part of the cone and then by absorbed the absorbent body and thus do not flow through the object.

The Capillary force of the liquid is generally approximated by the Laplace equation described.

p_A

= die Kapillarkraft im kleiner Teil

p_R

= die Kapillarkraft im größeren Teil

γ

= die Oberflächenspannung

θ

= der Benetzungswinkel

r

= der Radius der Kapillare

wobei A die kleinere Kapillare ist und R die größere. Es ist daher möglich zu demonstrieren, dass die Flüssigkeit nicht in Richtung vom oberen Teil zur breiteren Öffnung eines kegelförmigen Hohlraums fließen wird, sondern im oberen Teil des im Wesentlichen kegelförmigen Hohlraums verbleibt. Durch die Basis des im Wesentlichen kegelförmigen Hohlraums kann Luft leicht in die größeren Abschnitte des Absorptionskörpers eintreten und auf diese Art und Weise den absorbierenden Gegenstand trocknen oder einfach belüften und somit auch die Haut, die durch den absorbierenden Gegenstand bedeckt (verdeckt) ist.The Laplace equation gives an idea of the net force that affects the fluid to move from a larger capillary to a smaller capillary.

p _A

= the capillary force in the small part

p _R

= the capillary force in the larger part

γ

= the surface tension

θ

= the wetting angle

r

= the radius of the capillary

where A is the smaller capillary and R is the larger one. It is therefore possible to demonstrate that the liquid will not flow in the direction from the upper part to the wider opening of a conical cavity, but remains in the upper part of the substantially conical cavity. Through the base of the substantially conical cavity, air can easily enter the larger sections of the absorbent body and in this way dry or simply ventilate the absorbent article, and thus also the skin covered (covered) by the absorbent article.

According to one embodiment The substantially conical cavities extend through the entire absorption body. this makes possible a high level of breathability and creates the opportunity that the absorbent article and its absorbent core moisture transport away in various layers of the absorbent core can be present.

According to one another embodiment the absorption body conical cavities on, which are arranged in special areas of the absorption body are. In cases, in which an additional breathability desired in special areas This can be effected by only certain sections of the absorbent article are perforated. For example, the entire article except for the wetting area perforated be. In this context, wetting area refers to the area the absorbent article, which is expected to be liquid first receives, if z. As urinating or menstruation takes place. It is also possible the cavities to arrange in patterns that are essentially conical cavities with different density (i.e., one number of holes per unit area), different sizes of essentially conical cavities z. As two or more sizes, too use, or similar. It is also possible different areas with substantially conical cavities in combination with areas of pyramidal and / or funnel-shaped cavities embody.

at a further embodiment consists of those that surround substantially conical cavities Area, Completely or partially from the top layer. Is the surrounding area complete or partially from the top layer, it acquires the surface properties the latter, which can be very beneficial. For a hydrophobic Top layer is it z. B. possible a hydrophobic surrounding area to achieve the essentially conical cavities in it supports the substantially hydrophilic liquid not to allow durchzuströmen.

In a similar manner, it is possible to change the surface properties of the surface surrounding the substantially conical cavities by treating the cover sheet before it is perforated and formed into substantially conical cavities. The cover layer can also be treated during the perforation itself by z. For example, the roller used for perforation is coated with an agent which is transferred to the topsheet during perforation. It is then the inside of the substantially conical cavity, which is partially treated by the side of the cover layer, away from the absorbent body in contact with the perforation roll.

The Top layer can be treated on the side closest to absorbent body lies and it is also possible to treat both sides.

The Treating the topping may be desirable be because the substantially conical cavities in at least a part of the absorption body extend and get in touch with this. The interior of the absorption body becomes therefore to the surface the cover layer exposed and created a variety of way to substances or similar to lead from the cover layer to the absorption body. Several possible treatments be mentioned the top layer, z. As a pH treatment for pH control or treatment to a more hydrophobic surface provide. In certain cases can be a treatment desirable to be a less hydrophobic surface or a more hydrophilic one surface provide. It is also possible to use an indicator treatment to make an indication more diverse Conditions, such as the temperature, the moisture content, the pH, the enzyme activity or similar provide. The top layer can also be treated to the object Add bacteria. Examples of suitable bacteria are lactobacteria, but it is also possible a treatment for odor suppression or several similar functions perform.

According to one embodiment is the surrounding the substantially conical cavities area Completely or partially from a separate location, e.g. B. a plastic film or a nonwoven fabric between the absorbent body and the liquid-impermeable cover layer is arranged. Such a situation has the consequence that the im Essentially cone-shaped cavities from the outside are not so clearly perceptible, which are psychologically important for a wearer can, so that he has confidence in the absorbent object. It further means that it is possible is the cavities To grant properties that may not can be reached with a top layer or not in a top layer he wishes are. The area surrounding the substantially conical cavities can also be at least partially hydrophobic.

• i) Ein Absorptionskörper umfassend wenigstens eine Lage und mit einer ersten und einer zweiten Fläche ist auf einer Decklage angeordnet, wobei die zweite Fläche des Absorptionskörpers in Richtung der Decklage weist;
• ii) die Decklage und wenigstens ein Teil des Absorptionskörpers werden perforiert, so dass die Decklage und wenigstens ein Teil des Absorptionskörpers Hohlräume aufweisen, die im Wesentlichen kegelförmig sind und sich in einer verjüngenden Art und Weise von der Decklage und der zweiten Fläche des Absorptionskörpers in Richtung der ersten Fläche des Absorptionskörpers erstrecken;
• iii) eine flüssigkeitsdurchlässige Oberflächenlage wird auf der ersten Fläche des perforierten Absorptionskörpers angeordnet, so dass der Absorptionskörper zwischen der flüssigkeitsdurchlässigen Oberflächenlage und der perforierten Decklage liegt, und
• iv) die flüssigkeitsdurchlässige Oberflächenlage und die Decklage werden miteinander verbunden.

There are several different ways to make a breathable absorbent article, such as a diaper, pant diaper, incontinence pad, panty liner, microslip pad, sanitary napkin or the like. For example, the production can be carried out as follows:

• i) An absorbent body comprising at least one layer and having a first and a second surface is arranged on a cover layer, wherein the second surface of the absorbent body faces in the direction of the cover layer;
• ii) perforating the topsheet and at least a portion of the absorbent body such that the topsheet and at least a portion of the absorbent body have voids that are substantially conical and tapered in a direction from the topsheet and the second surface of the absorbent body extending the first surface of the absorbent body;
• iii) a liquid-permeable surface layer is placed on the first surface of the perforated absorbent body so that the absorbent body lies between the liquid-permeable surface layer and the perforated cover layer, and
• iv) the liquid-permeable surface layer and the cover layer are joined together.

According to one embodiment of the method, the cover layer and the absorbent body are perforated, such that the cover layer and the absorption body have cavities which pass completely through, essentially conical are and rejuvenating Extend from the cover layer to the first surface of the absorbent body.

• i) Ein Absorptionskörper umfassend wenigstens eine Lage und mit einer ersten und einer zweiten Fläche wird auf einer Decklage angeordnet, wobei die zweite Fläche des Absorptionskörpers in Richtung der Decklage weist;
• ii) eine flüssigkeitsdurchlässige Oberflächenlage wird auf der ersten Fläche des Absorptionskörpers angeordnet, so dass der Absorptionskörper zwischen der Oberflächenlage und der Decklage liegt;
• iii) die Decklage und wenigstens ein Teil des Absorptionskörpers werden perforiert, so dass die Decklage und wenigstens ein Teil des Absorptionskörpers Hohlräume aufweisen, die im Wesentlichen kegelförmig sind und sich von der Decklage und der zweiten Fläche des Absorptionskörpers auf verjüngende Art und Weise zur ersten Fläche des Absorptionskörpers erstrecken, und
• iv) die flüssigkeitsdurchlässige Oberflächenlage und die Decklage werden miteinander verbunden.

Another way of making a breathable absorbent article, such as a diaper, panty diaper, incontinence pad, panty liner, microslip pad, sanitary napkin, or the like, is as follows:

• i) An absorbent body comprising at least one layer and having a first and a second surface is arranged on a cover layer, wherein the second surface of the absorbent body faces in the direction of the cover layer;
• ii) a liquid-permeable surface layer is placed on the first surface of the absorbent body so that the absorbent body lies between the surface layer and the cover layer;
• iii) the topsheet and at least a portion of the absorbent body are perforated such that the topsheet and at least a portion of the absorbent body have voids that are substantially conical and taper from the topsheet and the second surface of the absorbent body to the first surface extend the absorbent body, and
• iv) the liquid-permeable surface layer and the cover layer are joined together.

In one embodiment of the method just described, the cover layer and the absorbent layer are perforated, so that the cover layer and the absorbent body having cavities which extend completely therethrough, are substantially conical in shape, and extend in a tapered manner from the topsheet to the first surface of the absorbent body.

• i) Ein Absorptionskörper umfassend wenigstens eine Lage und mit einer ersten und einer zweiten Fläche wird perforiert, so dass wenigstens ein Teil des Absorptionskörpers Hohlräume aufweist, die im Wesentlichen kegelförmig sind und sich von der zweiten Fläche des Absorptionskörpers auf verjüngende Art und Weise in Richtung der ersten Fläche des Absorptionskörpers erstrecken;
• ii) die zweite Fläche des Absorptionskörpers ist an einer flüssigkeitsundurchlässigen Decklage angeordnet;
• iii) eine flüssigkeitsdurchlässige Oberflächenlage wird auf der ersten Fläche des Absorptionskörpers angeordnet, so dass der Absorptionskörper zwischen der flüssigkeitsdurchlässigen Oberflächenlage und der Decklage liegt, und
• iv) die flüssigkeitsdurchlässige Oberflächenlage und die Decklage werden miteinander verbunden.

Another way of making a breathable absorbent article, such as a diaper, pant diaper, incontinence pad, panty liner, microslip pad, sanitary napkin, or the like, is as follows:

• i) An absorbent body comprising at least one layer and having a first and a second surface is perforated so that at least a portion of the absorbent body has cavities that are substantially conical and tapered from the second surface of the absorbent body in the direction of extending first surface of the absorbent body;
• ii) the second surface of the absorbent body is disposed on a liquid-impermeable cover sheet;
• iii) a liquid-permeable surface layer is placed on the first surface of the absorbent body so that the absorbent body lies between the liquid-permeable surface layer and the cover layer, and
• iv) the liquid-permeable surface layer and the cover layer are joined together.

at an embodiment Of the method just described, the absorbent body is so perforates that the absorption body has cavities that completely through are elongated, substantially conical and tapered in nature and way from the second surface of the absorption body to the first area of the absorption body extend.

• i) Ein Absorptionskörper umfassend wenigstens eine Lage und mit einer ersten und einer zweiten Fläche wird bereitgestellt;
• ii) die zweite Fläche des Absorptionskörpers wird an einer flüssigkeitsundurchlässigen Decklage angeordnet;
• iii) eine flüssigkeitsdurchlässige Oberflächenlage wird auf der ersten Fläche des Absorptionskörpers angeordnet, so dass der Absorptionskörper zwischen der Oberflächenlage und der Decklage liegt und die flüssigkeitsdurchlässige Oberflächenlage und die Decklage werden miteinander verbunden, und
• iv) die Decklage und wenigstens ein Teil des Absorptionskörpers werden perforiert, so dass die Decklage und wenigstens ein Teil des Absorptionskörpers mit Hohlräumen versehen sind, die im Wesentlichen kegelförmig sind und sich auf verjüngende Art und Weise von der Decklage und der zweiten Fläche des Absorptionskörpers zur ersten Fläche des Absorptionskörpers erstrecken.

Another way of making a breathable absorbent article, such as a diaper, pant diaper, incontinence pad, panty liner, microslip pad, sanitary napkin, or the like, is as follows:

• i) An absorbent body comprising at least one layer and having a first and a second surface is provided;
• ii) the second surface of the absorbent body is disposed on a liquid-impermeable cover sheet;
• iii) a liquid-permeable surface layer is placed on the first surface of the absorbent body so that the absorbent body lies between the surface layer and the cover layer, and the liquid-permeable surface layer and the cover layer are joined together, and
• iv) perforating the topsheet and at least a portion of the absorbent body such that the topsheet and at least a portion of the absorbent body are provided with voids that are substantially conical and tapered from the topsheet and the second surface of the absorbent body extend first surface of the absorbent body.

at an embodiment of the method just described, the cover layer and the absorbent body are so perforated, that the cover layer and the absorption body have cavities, the complete run through, are substantially conical and tapered in nature and manner of the cover layer and the second surface of the absorbent body to first surface of the absorption body extend.

at all mentioned above Method for producing an absorbent article according to the invention can the perforation by z. B. a Heißnadelperforators, a Kaltnadelperforators by punching, by means of rejuvenated Cutting tools, a laser, a Stempelperforators, rollers or similar carried out become

Short description the drawings

The Invention will be described below with reference to the figures of accompanied by accompanying drawings, in which:

1 a panty liner shows;

2a a part of a section along the line II-II through the panty liner in 1 shows;

2 B a part of a section along the line II-II through the panty liner in 1 in an alternative embodiment of the invention;

2c a part of a section along the line II-II through the panty liner in 1 in an alternative embodiment of the invention;

2d a part of a section along the line II-II through the panty liner in 1 in an alternative embodiment of the invention;

2e a part of a section along the line II-II through the panty liner in 1 in an alternative embodiment of the invention;

3a - 3b show substantially conical volumes; and

3c shows an XY diagram showing a rotation function with associated boundaries.

options to run the invention

The The invention can be described in several different absorbent articles for Use come, z. Diapers, panty liners, incontinence pads, incontinence product with a belt, Panty liners, micro-panty liners, sanitary napkins or the like. In the following, however, only a panty liner will be explained.

The panty liner 1 in the 1 and 2a - e has a substantially elongated shape with a longitudinal direction and a transverse direction and has two long sides 2 . 3 , two short pages 4 . 5 , a first end portion 6 , a second end portion 7 and a crotch section 8th that is between the first end section 6 and the second end portion 7 is arranged, a longitudinal center line 9 extending in the longitudinal direction of the panty liner and a transverse centerline 10 which extends in the transverse direction of the panty liner, on. Centerline denotes a line that runs in the longitudinal or transverse direction and equidistant from the long sides 2 . 3 or the short sides of the panty liner 1 is arranged. The panty liner 1 has a top 11 , which in use is intended to point to the wearer and a base 12 designed to be away from the wearer.

The panty liner 1 comprises a liquid-permeable surface layer 13 that on the top 11 is arranged so that it faces the wearer in use and a liquid-impermeable cover layer 14 on the bottom 12 , Between the surface layer 13 and the top layer 14 is an absorbent body 15 arranged. The surface layer 13 and the top layer 14 are suitably by an adhesive with the absorption body 15 connected and during the preparation of the panty liner, the various layers by an embossing roll during the adhesive bond, z. B. around the edge 16 the panty liner are compressed. It is also possible during production to emboss patterns in the article. Within the edge 16 For example, the article has a substantially uniform thickness, which means that it has a planar shape to achieve good contact with the outer surface of the genital area of the wearer.

On the bottom 12 the panty liner can be a fastening device (not shown in the figures) in the form of z. B. pressure-sensitive adhesive may be provided. The adhesive may cover the entire underside, be applied in parallel strips along the bottom, or in any other suitable pattern, such as a diamond pattern or dots on the bottom. It is nevertheless important that not so much adhesive is applied that the panty liner is no longer breathable. A removable protective layer may be disposed over the adhesive. The protective layer is removed from the carrier before the panty liner is secured in the undergarment of the wearer. The protective layer may, for. B. may be a so-called. Release paper, which may consist of a paper that is coated with silicone, but it may also be made of another material with release properties, eg. B. a sealing material, be formed. It is also possible to use other fastening means such as hook and loop fasteners or frictional fasteners.

The surface layer 13 can be made of any conventional material, for. Example, one or more nonwoven fabrics, one or more plastic layers, perforated nonwoven fabric, perforated plastic layers, laminates, the above-mentioned materials or combinations thereof.

The top layer 14 may suitably consist of a substantially liquid-impermeable material, such as a thin liquid-impermeable plastic layer or of a material which itself is permeable to liquid but has been coated with a layer of plastic, synthetic resin or other liquid-impermeable material. The top layer 14 Therefore, it can be made of any material that meets the criterion of liquid impermeability, so that leakage through the bottom is prevented and for this purpose has sufficient flexibility and skin friendliness. Examples of suitable materials are plastic, films made of Polyethlen, polyester or polypropylene, foams, nonwovens and laminates of foams and plastic films. A topsheet consisting of a laminate of a liquid impermeable plastic layer facing the absorbent body and a nonwoven facing the wearer's undergarments provides a liquid-tight layer with a textile haptic. It is also possible to design the top layer of the panty liner made of a breathable cover layer, the z. B. SMS (Spunbond-meltblown-spunbond nonwoven fabric) or a usable plastic film, z. B. polyethylene is formed.

The absorption body 15 is suitably formed from natural fibers such as cellulose pulp, absorbent synthetic fiber or blends of natural or synthetic fibers. The absorption body 15 preferably consists of an air-laid cellulose body. It is also possible to introduce so-called superabsorbents in the absorption body. A superabsorbent is a polymer capable of absorbing its own weight of liquid several times. The absorption body 15 may also contain additional components such as shape stabilizing devices, liquid distributing device or binder. It is also possible to use various types of absorbent foams in the absorbent body. The absorbent body may of course be constructed of one or more different layers; z. B. can also be contained in the absorption body at least one receiving position. In the following drawings, the absorption body and the receiving layer are described separately, but only to indicate a number of different embodiments which are possible within the scope of the invention and are not intended to limit the definition of the absorbent body to a body without a receiving layer ,

A recording situation 17 is between the surface layer 13 and the absorbent body 15 arranged. The purpose of the hostage situation 17 It is to suck liquid into the absorbent article, to distribute the liquid and to move the liquid down to the absorbent body 15 to transport. The recording situation 17 can be made from z. As a nonwoven fabric with low density, cotton or the like may be formed.

2a shows a part of a section through the panty liner in 1 along the line II-II in 1 , The section shows the surface layer 13 , the top layer 14 and also the recording situation 17 and the absorbent body 15 , The recording situation 17 is between the surface layer 13 and the absorbent body 15 arranged. The absorption body is between the receiving layer 17 and the top layer 14 arranged. The panty liner 1 in the 1 and 2 has substantially conical cavities 20 auf, which in the embodiment in 2a the entire route through the absorption body 15 and a certain distance to the reception location 17 extend. The essentially conical cavities 20 have an upper part 21 and a base 22 on, with the upper part 21 has a smaller circumference than the base 22 , According to the embodiments in FIGS

2a -E is the upper part of the surface layer 13 arranged as the base 22 , The conical cavities 20 also have an inner wall 23 or a surrounding surface substantially entirely or partially from the topsheet 14 which helps during manufacture, the substantially conical cavities 20 train. The inner wall 23 also helps in the form of the substantially conical cavities after production 20 to keep. The inner wall 23 the substantially conical cavities 20 may be completely or partially from the absorption body 15 exist and in a way, as it is not shown in figures.

2 B shows a part of a section of another embodiment. The section shows the surface layer 13 , the top layer 14 and also the recording situation 17 and the absorbent body 15 , The recording situation 17 is between the surface layer 13 and the absorbent body 15 arranged. The absorption body 15 is between the hostage situation 17 and the top layer 14 arranged. The panty liner in 2 B has substantially conical cavities 20 on, in this embodiment, the entire distance through the absorption body 15 and the entire route through the recording site 17 extend. The essentially conical cavities 20 have an upper part 21 and a base 22 on, with the cavity in the upper part 21 a smaller circumference than at the base 22 having. In 2 B is the upper part 21 closer to the surface layer 13 arranged as the base 22 , The conical cavities 20 each further have an inner wall 23 essentially completely off the top layer 14 stands.

2c shows a part of a section of another embodiment of the panty liner. The section shows the surface layer 13 , the top layer 14 and also the recording situation 17 and the absorbent body 15 , The recording situation 17 is between the surface layer 13 and the absorbent body 15 arranged. The absorption body 15 is between the hostage situation 17 and the top layer 14 arranged. The panty liner in 2c has substantially conical cavities 20 , in this embodiment, the entire distance through the absorption body 15 and a leg through the recording location 17 extend, on. The essentially conical cavities 20 have an upper part 21 and a base 22 on, with the scope of the cavities 20 in the upper part 21 is smaller than at the base 22 , The conical cavities 20 also each have an inner wall 23 or a surrounding area, partially from the top layer 14 consists and partially of the absorption body 15 and to some extent from the hostage situation 17 ,

2d shows a part of a section of another embodiment of the panty liner. The section shows the surface layer 13 , the top layer 14 and also the recording situation 17 and the absorbent body 17 , The recording situation 17 is between the surface layer 13 and the absorbent body 15 arranged. The absorption body 15 is between the hostage situation 17 and the top layer 14 arranged. The panty liner in 2d has substantially conical cavities 20 , in this embodiment, the entire distance through the absorption body 15 and the entire route through the recording site 17 and also by the surface layer 13 extend, on. The essentially conical cavities 20 have an upper part 21 and a base 22 on, with the scope of the cavities 20 in the upper part 21 is smaller than at the base 22 , The conical cavities 20 also each have an inner wall 23 or a surrounding area, partially from the top layer 14 , the absorption body and to some extent from the receiving position 17 and the surface layer 13 consists.

The 2e shows a part of a section of another embodiment of the panty liner. The section shows the surface layer 13 , a first cover layer 24 and also the recording situation 17 and the absorbent body 15 , The recording situation 17 is between the surface layer 13 and the absorbent body 15 arranged. The absorption body 15 is between the hostage situation 17 and the first cover layer 24 arranged. The panty liner in 6 also has substantially conical cavities 20 on, in this embodiment, the entire distance through the absorption body 15 and the entire route through the recording site 17 and also by the surface layer 13 extend. The essentially conical cavities 20 have an upper part 21 and a base 22 on, with the upper part 21 smaller than the base 22 , The conical cavities 20 also each have an inner wall 23 or a surrounding area, partially from the first cover layer 24 and also the absorbent body and to some extent the receiving layer 17 and the surface layer 13 consists. The panty liner in 2e also has a second outer cover layer 14 on, the first coverage 14 is arranged so that the substantially conical cavities 20 are not visible or not immediately noticeable. The first cover layer 24 and the second cover layer 14 They can be made of the same material, but they can also be made of different materials. Preferably, the at least second cover layer 14 formed from a substantially breathable material.

It is possible the substantially conical cavity 20 using z. B. a conventional cone according to 3a with a height h, a base radius r, a side s, a base B = π · r ² , a surrounding area M = π · r · s and a volume V = (π · r ² · h) / 3 and also one upper part P to describe.

3b shows an alternative embodiment of a substantially conical cavity. The upper part P is made blunt and has a flat surface opposite to the base. This form is of course applicable to pyramidal cavities.

According to another embodiment, it is possible to image all or part of the substantially conical holes by rotating a function F (X) about the X-axis in an XY diagram, as shown in FIG 3c is shown. The volume V is then achieved by the following formulas:

This is applicable if Y _a <Y _b , ie if f (X _a ) <f (X _b ), ie the value Y of the function at point a should be smaller than the value Y of the function at point b and further a ≤ a ₂ <b.

Additionally The function should be Y = f (X), which is the essentially conical hole describes be such that the value of Y in the interval X = a and X = bY ≤kX + m and also the function Y = f (X) should be such that the values for Y in the interval X = a and X = b Y> m are (a defines the upper part and b the base of the cone).

Where Y = kX + m is the equation of a line, k is the slope of the line and m is the intersection with the y-axis if x = 0. On the rotation of Y = kX + m in the interval X = a and X = b and with a <b and m = 0 becomes the conventional cone, as in 3a is shown described.

According to another embodiment, the substantially conical hole may have a more funnel-like shape. The substantially conical hole is then described by values for Y in which X = a and X = a ₂ must be Y = m in the interval and the remaining part is described by the function Y = f (X), which must be in that the values for Y must be in the interval X = a ₂ and X = b Y ≤ kX + m and the function Y = f (X) must be such that the values for Y in the interval X = a ₂ and X = b Y> m and a <a ₂ <b.

It It should be noted that the Y-axis of the longitudinal and transverse plane of the absorbent Object corresponds and the X-axis of the strength of the absorbent article corresponds, d. H. the distance between the liquid-permeable surface layer and the substantially liquid-impervious topsheet of the absorbent article.

at an embodiment show the cavities a height of about 0.5-30 mm, preferably 0.5-5 mm. The substantially conical cavities have a base radius of about 0.5-10 mm, preferably 0.5-5 mm and most preferably 0.5-2 mm up.

In some embodiments, it may be advantageous to describe the base area instead of a radius, especially when describing a pyramid or funnel-like cavity. The base area of the cavities is then about 0.78-315 mm ² , preferably 0.78-79 mm ^2, and most preferably 0.78-51 mm ² .

example

A panty liner according to the invention was produced with the following structure: a carded nonwoven surface layer having a basis weight of 26 g / m ² . The surface layer was applied using a hot melt having a basis weight of 7 g / m ² to a distribution layer in the form of an air laid nonwoven paper having a basis weight of 80 g / m ² , again using a hot melt having a basis weight of 9 g / m ² was attached to a chemothermomechanical pulp absorbent body (CTMP) having a basis weight of 200 g / m ² . Superabsorbents (SAPs) with a basis weight of 50 g / m ² were introduced into the absorption body. The absorbent body was attached using a hot melt having a basis weight of 5 g / m ² to a polypropylene nonwoven fabric having a basis weight of 39 g / m ² .

The entire article was cold-needle perforated to produce the substantially conical cavities of the invention. A layer of spunbond and nonwoven fabric having a basis weight of 22 g / m ² was then applied as a cover layer. A hot melt having a basis weight of 35 g / m ² was subsequently applied to the cover sheet, after which a release paper (securing paper for the bonding adhesive) having a basis weight of 43 g / m ^{2 was applied} over the adhesive.

Claims (18)

Absorbent article having a first substantially liquid-permeable surface layer ( 3 ), a substantially liquid-impermeable cover layer ( 14 ) and between the liquid-permeable surface layer ( 13 ) and the liquid-impermeable cover layer ( 14 ) arranged absorption body ( 15 ) comprising at least one layer, characterized in that the absorbent article has cavities ( 20 ), which are substantially conical or have a pyramid-like or funnel-like shape, comprising such cavities, which have more sides than a pyramid and at least through a part of the absorption body ( 15 ), and in that the cavities ( 20 ) an upper part ( 21 ) and a base ( 22 ), the upper part ( 21 ) has a smaller circumference than the base ( 22 ) and in the direction of or in the liquid-permeable surface layer ( 13 ), and the base ( 22 ) away from the liquid-permeable surface layer ( 13 ) is arranged. Absorbent article according to claim 1, in which the cavities ( 20 ) through the entire absorption body ( 15 ). Absorbent article according to claim 1, wherein the absorption body ( 15 ) in special areas cavities ( 20 ) having. Absorbent article according to one of the preceding claims, in which the absorption body ( 15 ) Cavities ( 20 ) having different sizes. Absorbent article according to any one of the preceding claims, in which the cavities ( 20 ) enclosing area ( 23 ) completely or partially from the cover layer ( 14 ; 24 ) consists. Absorbent article according to any one of the preceding claims, in which the cavities ( 20 ) enclosing area ( 23 ) completely or partially from a separate layer ( 24 ) which exists between the absorption body ( 15 ) and the liquid-impermeable cover layer ( 14 ) is arranged. Absorbent article according to any one of the preceding claims, in which the cavities ( 20 ) enclosing area ( 23 ) completely or partially from a plastic film ( 24 ) which exists between the absorption body ( 15 ) and the liquid-impermeable cover layer ( 14 ) is arranged. Absorbent article according to any one of the preceding claims, in which the cavities ( 20 ) enclosing area ( 23 ) is at least partially hydrophobic. Absorbent article according to one of the preceding claims, in which the cover layer ( 14 ) is treated with one or more agents to alter the properties of the liner, wherein the means (s) for controlling pH serve to provide a more hydrophobic surface to provide a less hydrophobic surface or a hydrophilic surface to provide a display of the Temperature, moisture content, pH, enzyme activity or odor reduction, or to add bacteria to the article, for example, lactobacteria. Absorbent article according to one of the preceding claims, in which the cavities ( 20 ) has a height of about 0.5-30 mm, preferably 0.5-5 mm, and a base area of about 0.19-79 mm ² , preferably 0.19-40 mm ² , and most preferably 0.19- 4 mm ² . Absorbent article according to one of the preceding claims, in which it is possible to increase the void volume by rotation of a function Y = f (X) to describe the X-axis in an XY diagram, where the volume V is obtained by the following formula:

if a <b, where the function Y = f (X), which essentially describes the conical hole, should additionally be such that the values for Y in the interval X = a and X = b Y ≤ kX + m, and furthermore, the function Y = f (X) should be such that the values for Y should be in the interval X = a and X = b Y> m, where Y = kX + m is the equation of the straight line, k is the slope of the Is line, and m is the intersection with the y-axis if x = 0, and a defines the apex and b the base of the cone. A method of making a breathable absorbent article, characterized in that the method comprises the steps of: i) providing an absorbent body comprising at least one layer and having first and second surfaces, ii) providing a topsheet and a liquid pervious surface layer; iii) perforating at least a portion of the absorbent body such that at least a portion of the absorbent body having voids ( 20 ), which are substantially conical or have a pyramid-like or funnel-like shape, comprising such cavities which have more sides than a pyramid, and wherein the cavities ( 20 ) an upper part ( 21 ) and a base ( 22 ), the upper part ( 21 ) smaller in size than the base ( 22 ) and extending in a tapered manner from the second surface of the absorbent body toward the first surface of the absorbent body. Method according to claim 12, characterized in that that the absorption body is perforated so that the cavities in a tapered Way from the second surface of the absorbent body to the first surface of the absorbent body extend. Method according to claim 12 or 13, characterized that the absorption body on the cover layer with the second surface of the absorption body in Direction of the cover layer is arranged. Method according to claim 14, characterized in that that the cover layer and at least a part of the absorption body in such a way perforated, that the cover layer and at least a part of the absorbent body with the cavities are provided in a tapered manner from the top layer towards the first surface of the absorption body extend. Method according to claim 15, characterized in that that the cover layer and the absorption body are perforated in such a way that the cover layer and the absorption body are provided with cavities, the entire distance from the top layer to the first surface of the absorbent body run and become in a rejuvenating Way from the top layer to the first surface of the absorbent body extend. Method according to one of claims 14 to 16, characterized that the liquid-permeable surface layer on the first surface of the absorption body is arranged, so that the absorption body between the surface layer and the topsheet, and wherein the liquid pervious surface layer and the cover layer are joined together. Method according to one of claims 12 to 17, in which the Perforations, for example by means of a hot-pin perforator, a drypoint perforator, by punching or using tapered cutting tools created become.